No ruling has been made yet on whether Tamura was suffering from the disease chronic traumatic encephalopathy (CTE), which he claimed to have had.

The gunman, who said in a note he believed he had CTE, targeted skyscraper that houses the NFL's headquarters.

Shane Tamura — who fatally shot four people at a Midtown East office building — said in a suicide note he believed he suffered from CTE and requested his brain be studied.